What is the Manager

The Manager is an executable that wraps one or more Controllers. It may
either be built and run locally against a remote cluster, or run as a container
in the cluster.

When run as a container, it should be installed into its own Namespace with a
ServiceAccount and RBAC permissions on the appropriate resources. The configs
to do this are automatically generated for the user by running make.

Note that the Manager is run as a StatefulSet and not a Deployment. This
is to ensure that only 1 instance of the Manager is run at a time (a Deployment
may sometimes run multiple instances even with replicas set to 1).

Building and Running Locally

Build and run locally against the cluster defined in ~/.kube/config. Note
this requires a running Kubernetes cluster to be accessible with the
~/.kube/config.